The easiest way to do this is to find one of their articles that
has already been published on one of the article
directories, and then include it in your report. The terms of
service for these directories say that you must not edit or
change the original article in any way, and that you must
leave the author's bio, or resource box, intact. Hundreds of
my articles have been used by others in this exact way, and
I am always thrilled to have the exposure.
Here is an example of a short report I wrote, using articles
from several people I recommend on a regular basis: